Correctly handle a zero value for X25519 deriveBits' length parameter

The Secure Curves spec draft states that we should trunk the derived
bits based on any non-null value passed in the length parameter. Our
currently implementation has been considering zero like null, so we
are returning the entire derived bits array.

The bug 1433707 mentions on ongoing discussion related to the lack of
interoperability on the handling of the deriveBits' length parameter
in several algorithms, being the X25519 one of them. The proposed
change in the spec could be backward-incompatible, so we need time to
evaluate the impact on Chrome's implementation.

While the mentioned spec change discussion continues, this CL fixes a bug in our implementation that considered zero as null. With this change zero will return an empty vector, which matches the current spec.

Bug: 1433707
Change-Id: Ifbf5829db04bbc7c9ff916d27b586feae345b536
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5013612
Commit-Queue: Javier Fernandez <jfernandez@igalia.com>
Reviewed-by: Elly FJ <ellyjones@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1244653}
4 files changed
tree: 98b92b0d15759638481165ecf2d1b8aa4c498380
  1. .github/
  2. .well-known/
  3. accelerometer/
  4. accessibility/
  5. accname/
  6. acid/
  7. ambient-light/
  8. animation-worklet/
  9. annotation-model/
  10. annotation-protocol/
  11. annotation-vocab/
  12. apng/
  13. appmanifest/
  14. attribution-reporting/
  15. audio-output/
  16. autoplay-policy-detection/
  17. avif/
  18. background-fetch/
  19. background-sync/
  20. badging/
  21. battery-status/
  22. beacon/
  23. bluetooth/
  24. browsing-topics/
  25. captured-mouse-events/
  26. clear-site-data/
  27. client-hints/
  28. clipboard-apis/
  29. close-watcher/
  30. common/
  31. compat/
  32. compression/
  33. compute-pressure/
  34. conformance-checkers/
  35. console/
  36. contacts/
  37. content-dpr/
  38. content-index/
  39. content-security-policy/
  40. contenteditable/
  41. cookie-deprecation-label/
  42. cookie-store/
  43. cookies/
  44. core-aam/
  45. cors/
  46. credential-management/
  47. css/
  48. custom-elements/
  49. custom-state-pseudo-class/
  50. delegated-ink/
  51. density-size-correction/
  52. deprecation-reporting/
  53. device-memory/
  54. direct-sockets/
  55. docs/
  56. document-picture-in-picture/
  57. document-policy/
  58. dom/
  59. domparsing/
  60. domxpath/
  61. dpub-aam/
  62. dpub-aria/
  63. ecmascript/
  64. editing/
  65. element-timing/
  66. encoding/
  67. encoding-detection/
  68. encrypted-media/
  69. entries-api/
  70. event-timing/
  71. eventsource/
  72. eyedropper/
  73. feature-policy/
  74. fenced-frame/
  75. fetch/
  76. file-system-access/
  77. FileAPI/
  78. fledge/
  79. focus/
  80. font-access/
  81. fonts/
  82. forced-colors-mode/
  83. fs/
  84. fullscreen/
  85. gamepad/
  86. generic-sensor/
  87. geolocation-API/
  88. geolocation-sensor/
  89. graphics-aam/
  90. graphics-aria/
  91. gyroscope/
  92. hr-time/
  93. html/
  94. html-aam/
  95. html-longdesc/
  96. html-media-capture/
  97. https-upgrades/
  98. idle-detection/
  99. imagebitmap-renderingcontext/
  100. images/
  101. import-maps/
  102. IndexedDB/
  103. inert/
  104. infrastructure/
  105. input-device-capabilities/
  106. input-events/
  107. installedapp/
  108. interfaces/
  109. intersection-observer/
  110. intervention-reporting/
  111. is-input-pending/
  112. jpegxl/
  113. js/
  114. js-self-profiling/
  115. keyboard-lock/
  116. keyboard-map/
  117. largest-contentful-paint/
  118. layout-instability/
  119. lifecycle/
  120. loading/
  121. long-animation-frame/
  122. longtask-timing/
  123. magnetometer/
  124. managed/
  125. mathml/
  126. measure-memory/
  127. media/
  128. media-capabilities/
  129. media-playback-quality/
  130. media-source/
  131. mediacapture-extensions/
  132. mediacapture-fromelement/
  133. mediacapture-handle/
  134. mediacapture-image/
  135. mediacapture-insertable-streams/
  136. mediacapture-record/
  137. mediacapture-region/
  138. mediacapture-streams/
  139. mediasession/
  140. merchant-validation/
  141. mimesniff/
  142. mixed-content/
  143. mst-content-hint/
  144. navigation-api/
  145. navigation-timing/
  146. netinfo/
  147. network-error-logging/
  148. notifications/
  149. old-tests/
  150. orientation-event/
  151. orientation-sensor/
  152. page-lifecycle/
  153. page-visibility/
  154. paint-timing/
  155. parakeet/
  156. payment-handler/
  157. payment-method-basic-card/
  158. payment-method-id/
  159. payment-request/
  160. pending-beacon/
  161. performance-timeline/
  162. periodic-background-sync/
  163. permissions/
  164. permissions-policy/
  165. permissions-request/
  166. permissions-revoke/
  167. picture-in-picture/
  168. png/
  169. pointerevents/
  170. pointerlock/
  171. preload/
  172. presentation-api/
  173. print/
  174. private-aggregation/
  175. private-click-measurement/
  176. proximity/
  177. push-api/
  178. quirks/
  179. referrer-policy/
  180. remote-playback/
  181. reporting/
  182. requestidlecallback/
  183. resize-observer/
  184. resource-timing/
  185. resources/
  186. sanitizer-api/
  187. savedata/
  188. scheduler/
  189. screen-capture/
  190. screen-details/
  191. screen-orientation/
  192. screen-wake-lock/
  193. scroll-animations/
  194. scroll-to-text-fragment/
  195. secure-contexts/
  196. secure-payment-confirmation/
  197. selection/
  198. serial/
  199. server-timing/
  200. service-workers/
  201. shadow-dom/
  202. shape-detection/
  203. shared-storage/
  204. shared-storage-selecturl-limit/
  205. signed-exchange/
  206. soft-navigation-heuristics/
  207. speculation-rules/
  208. speech-api/
  209. storage/
  210. storage-access-api/
  211. streams/
  212. subapps/
  213. subresource-integrity/
  214. svg/
  215. svg-aam/
  216. timing-entrytypes-registry/
  217. tools/
  218. top-level-storage-access-api/
  219. touch-events/
  220. trust-tokens/
  221. trusted-types/
  222. ua-client-hints/
  223. uievents/
  224. upgrade-insecure-requests/
  225. url/
  226. urlpattern/
  227. user-timing/
  228. vibration/
  229. video-rvfc/
  230. virtual-keyboard/
  231. visual-viewport/
  232. wai-aria/
  233. wasm/
  234. web-animations/
  235. web-bundle/
  236. web-locks/
  237. web-nfc/
  238. web-otp/
  239. web-share/
  240. webaudio/
  241. webauthn/
  242. webcodecs/
  243. WebCryptoAPI/
  244. webdriver/
  245. webgl/
  246. webgpu/
  247. webhid/
  248. webidl/
  249. webmessaging/
  250. webmidi/
  251. webnn/
  252. webrtc/
  253. webrtc-encoded-transform/
  254. webrtc-extensions/
  255. webrtc-ice/
  256. webrtc-identity/
  257. webrtc-priority/
  258. webrtc-stats/
  259. webrtc-svc/
  260. websockets/
  261. webstorage/
  262. webtransport/
  263. webusb/
  264. webvr/
  265. webvtt/
  266. webxr/
  267. window-management/
  268. workers/
  269. worklets/
  270. x-frame-options/
  271. xhr/
  272. .azure-pipelines.yml
  273. .gitattributes
  274. .gitignore
  275. .mailmap
  276. .taskcluster.yml
  277. CODE_OF_CONDUCT.md
  278. CODEOWNERS
  279. CONTRIBUTING.md
  280. LICENSE.md
  281. lint.ignore
  282. README.md
  283. wpt
  284. wpt.py
README.md

The web-platform-tests Project

Taskcluster CI Status documentation manifest Python 3

The web-platform-tests Project is a cross-browser test suite for the Web-platform stack. Writing tests in a way that allows them to be run in all browsers gives browser projects confidence that they are shipping software that is compatible with other implementations, and that later implementations will be compatible with their implementations. This in turn gives Web authors/developers confidence that they can actually rely on the Web platform to deliver on the promise of working across browsers and devices without needing extra layers of abstraction to paper over the gaps left by specification editors and implementors.

The most important sources of information and activity are:

  • github.com/web-platform-tests/wpt: the canonical location of the project's source code revision history and the discussion forum for changes to the code
  • web-platform-tests.org: the documentation website; details how to set up the project, how to write tests, how to give and receive peer review, how to serve as an administrator, and more
  • wpt.live: a public deployment of the test suite, allowing anyone to run the tests by visiting from an Internet-enabled browser of their choice
  • wpt.fyi: an archive of test results collected from an array of web browsers on a regular basis
  • Real-time chat room: the wpt:matrix.org matrix channel; includes participants located around the world, but busiest during the European working day.
  • Mailing list: a public and low-traffic discussion list
  • RFCs: a repo for requesting comments on substantial changes that would impact other stakeholders or users; people who work on WPT infra are encouraged to watch the repo.

If you'd like clarification about anything, don't hesitate to ask in the chat room or on the mailing list.

Setting Up the Repo

Clone or otherwise get https://github.com/web-platform-tests/wpt.

Note: because of the frequent creation and deletion of branches in this repo, it is recommended to “prune” stale branches when fetching updates, i.e. use git pull --prune (or git fetch -p && git merge).

Running the Tests

See the documentation website and in particular the system setup for running tests locally.

Command Line Tools

The wpt command provides a frontend to a variety of tools for working with and running web-platform-tests. Some of the most useful commands are:

  • wpt serve - For starting the wpt http server
  • wpt run - For running tests in a browser
  • wpt lint - For running the lint against all tests
  • wpt manifest - For updating or generating a MANIFEST.json test manifest
  • wpt install - For installing the latest release of a browser or webdriver server on the local machine.
  • wpt serve-wave - For starting the wpt http server and the WAVE test runner. For more details on how to use the WAVE test runner see the documentation.

Windows Notes

On Windows wpt commands must be prefixed with python or the path to the python binary (if python is not in your %PATH%).

python wpt [command]

Alternatively, you may also use Bash on Ubuntu on Windows in the Windows 10 Anniversary Update build, then access your windows partition from there to launch wpt commands.

Please make sure git and your text editor do not automatically convert line endings, as it will cause lint errors. For git, please set git config core.autocrlf false in your working tree.

Publication

The master branch is automatically synced to wpt.live and w3c-test.org.

Contributing

Save the Web, Write Some Tests!

Absolutely everyone is welcome to contribute to test development. No test is too small or too simple, especially if it corresponds to something for which you've noted an interoperability bug in a browser.

The way to contribute is just as usual:

  • Fork this repository (and make sure you're still relatively in sync with it if you forked a while ago).
  • Create a branch for your changes: git checkout -b topic.
  • Make your changes.
  • Run ./wpt lint as described above.
  • Commit locally and push that to your repo.
  • Create a pull request based on the above.

Issues with web-platform-tests

If you spot an issue with a test and are not comfortable providing a pull request per above to fix it, please file a new issue. Thank you!